It does not create a chart

SGaist

Hi,

Your queue is empty because nothing fills it.

deleted286

In here I thought I was adding the datas into the queue

void mythread::writeData()
{

    QFile::copy("C:/Users/ilknu/Documents/MyThread/deneme.txt", "C:/Users/ilknu/Documents/MyThread/n.txt");
    QFile file2("C:/Users/ilknu/Documents/MyThread/n.txt");

    qDebug() << "im working in writeData part " ;

    if(file2.open(QIODevice::ReadOnly))
    {
        QTextStream in(&file2);
        while(!in.atEnd())
        {
            QString line2 = in.readAll();
            QStringList list2 = line2.split(QLatin1Char(' '), Qt::SkipEmptyParts);
            for(const QString &entry : list2)
            {
                double num = entry.toDouble();
                queue.enqueue(num);
                qDebug() << num;
            }
        }
    }
    file.close();
    emit writingDone();
}

SGaist

That queue variable belongs to your mythread class. It's not the same as the one from your MainWindow class even if it has the same name.

deleted286

@SGaist can i connect them, or what can i do for this problem? I read and write in mythread.cpp
If i move initChartView and timer_slot, is it true?

SGaist

@suslucoder said in It does not create a chart:

If i move initChartView and timer_slot, is it true?

It won't change anything as these two variables will still be unrelated.

@suslucoder said in It does not create a chart:

can i connect them, or what can i do for this problem? I read and write in mythread.cpp

You have to get the data from your mythread object back to your MainWindow.

As I already suggested, you really should start with C++ basics before playing with threading.

deleted286

@SGaist said in It does not create a chart:

You have to get the data from your mythread object back to your MainWindow.

What is the way for getting datas from mythread to my mainwindow? I would be very happy if you could show me the way

SGaist

Use a signal to transfer the queue. Make it a const reference.

deleted286

@SGaist can you show me an example? I did not understand

SGaist

What did you not understand ?

deleted286

@SGaist if my slot is my queue, what should be the signal. I didnt understand it.

SGaist

Your slot is not your queue. Did you read the chapter about signals and slots ?

deleted286

@SGaist yes i did. But i cannot understand how can i get datas

jsulm

@suslucoder What exactly can't you understand? In the documentation @SGaist posted there is even an example with signal/slot with parameter...